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1.153.8 SortedCollection: searching

includes: anObject
Private - Answer whether the receiver includes an item which is equal to anObject

indexOf: anObject startingAt: index ifAbsent: aBlock
Answer the first index > anIndex which contains anElement. Invoke exceptionBlock and answer its result if no item is found

occurrencesOf: anObject
Answer how many occurrences of anObject can be found in the receiver